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Finding the Fourth Proportional to 1,351,768.86, 1,865,431.80 and 778,796.70

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Solution

The fourth proportional to 1,351,768.86, 1,865,431.80 and 778,796.70 is: 1,074,734.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,351,768.86 : 1,865,431.80 = 778,796.70 : x
  2. Step 2: Convert to fraction form
    1,351,768.86/1,865,431.80 = 778,796.70/x
  3. Step 3: Cross multiply
    1,351,768.86x = 1,865,431.80 × 778,796.70
  4. Step 4: Simplify right side
    1,351,768.86x = 1,452,792,129,915.06
  5. Step 5: Solve for x
    x = 1,452,792,129,915.06/1,351,768.86
  6. Step 6: Final answer
    x = 1,074,734.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.